"Radical post-Zionists go beyond criticism of the Zionist establishment and the policies of the State of Israel to question the Jewish right to national expression through a sovereign state. [They] exploit the dilemma Israel faces in reconciling Jewish nationalism with the values of liberalism and democracy…[They] reject a continued connection to the Jewish people of the Diaspora. They prefer improving relations with Israeli Arabs with whom they share a territory…[They] insist that Israelis must choose between a state reflecting liberal, democratic, and universalist values, on the one hand, and a state reflecting Jewish particularist values - defined as undemocratic - on the other."
Besides the idea of cutting of relations with the people of the Diaspora (which I think was gratuitously included there as it's really hard for me to believe that Israelis would not want to keep in contact with other people who are culturally and religiously jewish, just like any group would want to), I fail to see how any of this is radical, controversial, or anti-semitic.
Or unreasonable. Or anti-Jewish.